ASME QW-453 Clarification

[duongwe]

I will be qualifying the Corrosion-Resistant Overlay on base metal A106 Grade B, with dimensions of 8"x8.18mm and a length of 150mm. The cladding will be performed using TIG ERNiCrMo-3 with internal 02 layers (around 5mm).

To comply with table QW-453, I need to determine the range of thickness for both the base metal and the cladding overlay. Specifically, I am seeking information on:

1) The acceptable range of thickness for the base metal.
2) The acceptable range of thickness for the cladding overlay.

 

[ethan18]

1. The qualified base metal thickness would be 8.18 mm to unlimited. [assuming the 8.18 mm dimension in your question is the thickness of the plate).
2. The qualified cladding thickness would be 5 mm minimum (assuming the actual cladding thickness in coupon is 5 mm). There is no upper limit for qualified cladding thickness.